SYSCALL_DEFINE1(chdir, const char*, path) {
path = (const char*)user_to_kernel_check((uint32_t)path, MAX_PATH_SIZE, 0);
int r;
struct dirent *dirent;
r = dirent_find(path, -1, &dirent);
if (r < 0)
return SYSCALL_RETURN(r);
task_curr->fs.pwd = dirent;
return SYSCALL_RETURN(0);
}
int32
TFFS_fopen(
IN tffs_handle_t hfs,
IN byte * file_path,
IN byte * open_mode,
OUT tfile_handle_t * phfile)
{
int32 ret;
tffs_t * ptffs = (tffs_t *)hfs;
byte * fname, * path;
byte * dup_file_path;
tfile_t * pfile;
tdir_t * pdir;
tdir_entry_t * pdir_entry;
if (!hfs || !file_path || !open_mode || !phfile)
return ERR_TFFS_INVALID_PARAM;
ret = TFFS_OK;
pfile = (tfile_t *)Malloc(sizeof(tfile_t));
dup_file_path = dup_string(file_path);
pdir_entry = dirent_malloc();
fname = (byte *)Malloc(DNAME_MAX);
pfile->secbuf = (ubyte *)Malloc(ptffs->pbs->byts_per_sec);
Memset(pfile->secbuf, 0, ptffs->pbs->byts_per_sec);
path = dup_file_path;
if (!divide_path(dup_file_path, fname)) {
ret = ERR_TFFS_INVALID_PATH;
goto _release;
}
if (!_parse_open_mode(open_mode, &pfile->open_mode)) {
ret = ERR_TFFS_INVALID_OPENMODE;
goto _release;
}
if ((dir_init(ptffs, path, &pdir)) != DIR_OK) {
ret = ERR_TFFS_INVALID_PATH;
goto _release;
}
if (dirent_find(pdir, fname, pdir_entry) != DIRENTRY_OK) {
DBG("%s(): can't find file [%s] at [%s]\n", __FUNCTION__, fname, path);
if (pfile->open_mode == OPENMODE_READONLY) {
ret = ERR_TFFS_FILE_NOT_EXIST;
goto _release;
}
if (!dirent_init(fname, 0, TRUE, pdir_entry)) {
ret = ERR_TFFS_INVALID_PATH;
goto _release;
}
if ((ret = dir_append_direntry(pdir, pdir_entry)) != DIR_OK) {
if (ret == ERR_DIR_NO_FREE_SPACE) {
ret = ERR_TFFS_NO_FREE_SPACE;
}
else {
ret = ERR_TFFS_DEVICE_FAIL;
}
goto _release;
}
}
ret = _initialize_file(ptffs, pdir, pdir_entry, pfile);
if (ret == FILE_OK) {
*phfile = (tfile_handle_t)pfile;
}
_release:
Free(fname);
Free(dup_file_path);
return ret;
}
int32
TFFS_rmfile(
IN tffs_handle_t hfs,
IN byte * file_path)
{
int32 ret;
byte * fname, * path;
byte * dup_file_path;
tdir_t * pdir;
tffs_t * ptffs;
tdir_entry_t * pdir_entry;
ret = TFFS_OK;
if (!hfs || !file_path)
return ERR_TFFS_INVALID_PARAM;
ptffs = (tffs_t *)hfs;
dup_file_path = dup_string(file_path);
fname = (byte *)Malloc(DNAME_MAX);
pdir_entry = dirent_malloc();
path = dup_file_path;
if (!divide_path(dup_file_path, fname)) {
ret = ERR_TFFS_INVALID_PATH;
goto _release;
}
if ((dir_init(ptffs, path, &pdir)) != DIR_OK) {
ret = ERR_TFFS_INVALID_PATH;
goto _release;
}
if ((ret = dirent_find(pdir, fname, pdir_entry)) == DIRENTRY_OK) {
if (dirent_get_dir_attr(pdir_entry) & ATTR_DIRECTORY) {
ret = ERR_TFFS_IS_NOT_A_FILE;
goto _release;
}
if (dir_del_direntry(pdir, fname) != DIR_OK) {
ret = ERR_TFFS_REMOVE_FILE_FAIL;
goto _release;
}
if (fat_free_clus(pdir->ptffs->pfat, dirent_get_clus(pdir_entry)) != FAT_OK) {
ret = ERR_TFFS_REMOVE_FILE_FAIL;
goto _release;
}
ret = TFFS_OK;
}
else {
ret = ERR_TFFS_NO_SUCH_FILE;
goto _release;
}
_release:
Free(fname);
Free(dup_file_path);
dirent_release(pdir_entry);
dir_destroy(pdir);
return ret;
}
